Locomotive fire-box and boiler



.L n e e h S S t av e h S 3 R E S S E N T q d o M o m LOGOMOTIVE FIRE BOX AND BOILER.

No. 566,467. Patented Aug. 25 1896.

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T. NBSSER.

LOGOMOTIVE FIRE BOX AND BOILER.

Patented Aug. 2 5, 1896.

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T. NESSYER. LOOOMOTIVE FIRE BQX AND BOILER. No. 566,467. Patented Aug. 25 '1896.

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THEODOR NESSER, OF COLUMBUS, OHIO.

LOCOMOTIVE FIRE-BOX AND BOILER.

I SPECIFICATION forming part of Letters Patent No. 566,467, dated August 25, 1896.

7 Application filed May 1, 1895. Serial No. 547,729. (No model.)

To all whom it may concern.-

Be it known that I, THEODOR NESSER, a citizen of the United "States, residing at O- lumbus, in the county of Franklin and State of Ohio, have invented a certain new and useof fire-box and boiler construction, and has particular relation to that class of fire-boxes and boilers employed in locomotives.

The objects of my invention are to so construct and arrange the parts of the boiler and fire-box as to prevent the leakage of steam and water therefrom, to provide improved means for compensating for the contraction and expansion of the metal forming said parts, and to produce other improvements in details 2 o of construction which will be more fully point- These objects I accomed out hereinafter. plish in the manner illustrated in the accompanying drawings, in which- Figure 1 is a central vertical section of a fire-box and the rear portion of a locomotiveboiler. Fig. 2 is a detail view in elevation of my improved crown-sheet bolt connection. Fig. 3 is a view of the same taken at right angles with Fig. 1. Fig. 4 is a detail view in perspective illustrating the connection of the crown-sheet with my improved fire-box front or extension. Fig. 5 is a view in elevation illustrating the adjustable connection of the fire-box front with the boiler. Fig. 6 is a cen- Fig. 7 is a view in elevation of one of the compensator sections or strips h, and Fig. 8 is a plan view of the same.

Similar letters refer to similar parts through- 0 out the several views.

a represents the boiler, near the rear portion of which is located in the usual manner the fire-box 1). Of this fire-box, b represents the crown-sheet and b is the front-end sheet.

As indicated in the drawings,- this front-end at its forward end, thus resulting in the production of a forward-end extension of said fire-box. This extension or flange b is formed with a central swell or bead portion. d, which extends throughout the length of said flange b The boiler-tubes, which are indicated at e, have their inner ends secured in the end and which has its rear and bifurcated portion provided with a cross pin or bolt 9 which is adapted, as shown, to pass loosely through the slotted opening f of the bolt or arm f, the slotted end of the latter being inserted, as shown, within the bifurcation of said block. It is evident that any desired number of these bolts f and blocks 9 may be employed, and that the same may be arranged at such intervals one from the other as is deemed necessary.

As indicated, the fire-box may be formed in two or more transverse sections, the crownsheet and side walls thereof being connected by intervening compensator-strips h, each of which, as provided for the extension 19 is provided with a central elevation or bead portion h.

'i represents myimproved C1OW11*b01tS,Wi1iCi1 serve to adj ustably connect the crown-sheet and boiler-casing in the manner hereinafter described. In producing this connection I employ a suitable bracket or lug 7?, which, as shown, is riveted to the inner side of the boiler-casing. The inwardly-projecting portion 7c of this bracket is embraced by the bifurcated head or outer end of a bolt 7.3, the arms formed by this bifurcation being provided with oppositely-located elongated or slotted openings 70 through which passes loosely a pin or rivet 15 which extends through the portion 7a of the bracket 1'. The bolt it passes through and has its usual head k engaging with the outer end of a turnbuckle m. Into the inner end of this turnbuckle is screwed the outer-end portion of a bolt n, which extends outwardly through the crownsheet b, the head of said bolt 01 engaging with the inner surface of said crownsheet. The bolt n is, as indicated, threaded in its innerend'portion and surrounded by a short sleeve n which bears against the crown-sheet and on the outer end of which is adapted to bear a nut 41 which, as shown, screws upon said bolt a. As shown in the drawings, bolts 0, corresponding in construction with the bolts i, above described, may be employed, if desired, in connecting the ends of the fire-box with other portions of the boiler-casing. It is well known that theheat resulting from the fire and steam of locomotive-boilers causes an expansion of the parts of the boiler and fire-box, which, owing to the ununiform distribution of heat, is unequal, and this unequal expansion of the metal forming said parts and the contraction thereof, which is naturally followed bya reduction in heat, result in a straining of the bolt connections and in a consequent leakage of water and steam. Owing to the construction of the beaded or fold portion of the end extension 72 of the fire-box, it is evident that an additional area or quantity of material is provided,which may be moved outward or inward as a result of the varying temperatures without straining the fire-box sheeting or the connections therewith of the tubes 0. Owing to the adjustable connection of the bolts f with the blocks g, it is evident that said bolts f may be moved forward in case of a forward movement of the fire-box front without a disconnection of said bolts and blocks. It is evident that the limit of forward movement of the fire-box front will be regulated by the length of the slot f thus providing means for preventing too great an expansion of said front sheet. In producing the crown-bolt connections hereinbefore described of the crown-sheet and external casing, it will be seen that the turnbuckles n or nuts 07. may be so rotated as to provide a normally taut connection of said parts, and it will also be seen that any expansion of the crown-sheet will be compensated for by the contraction of said connections which is permitted by the slots 16 It will thus be seen that the expansion of the crown-sheet will not result in a straining or springing of the bolt connections with the boiler-casing.

In order to compensate for the backward and forward movement of the fire-box body,

I have provided the intersecting compensatorstrips h, the beaded portions of which will, as prescribed for the beads d of the extension 6 take up or compensate for the contraction and expansion of the metal of which said firebox is composed.

From the construction and operation which I have herein shown and described it will be seen that the straining or springing of the various metal parts of the fire-box and its connections will be obviated and the leakage of the same thereby prevented. It will also be observed that by the employment of the riveted internal brackets t the necessity of employing nuts on the outer side of the boilercasing is entirely obviated.

Having now fully described my invention, what I claim, and desire to secure by Letters Patent, is

1. In a locomotive fire-box and boiler construction the combination with the fire-box body consisting of the forward end, side and crown sheeting, of a separately-formed front fire-box sheet, an inwardly-projecting flange formed thereon and a fold or bead portion formed in said flange, the latter being connected with and forming an extension of the forward end of the fire-box, a horizontal stayrod f having one of its ends connected with said front fire-box sheet and having a slotted opening in its remaining end, a block g projecting from the boiler-casing and having its rear end bifurcated and a transverse pin extending through said bifurcation and through the end slot of said rod f, substantially as and for the purpose specified.

2. In a locomotive boiler and fire-box construct-ion the combination with the boilercasing and fire-box, of bolts 76 having their upper ends jointedly connected with the inner side of the boiler-casing, bolts '11 having their lower ends rigidly connected with the crown-sheet and turnbuckles having their upper ends engaging with the bolts 1c and having their lower ends adj ustably connected with the bolts 91 threads on the inner portions of said bolts n, sleeves n on said threaded portions, and nuts n on said bolts adapted to bear on said sleeves substantially as and for the purpose specified.

THEODOR NESSER.

In presence of C. O. SHEPHERD, O. H. MOSIER. 

